can the fade out animation start at 40% from the bottom in the pinning section

[Ivan Mocs 2 Likes (Newbie)]

can set fadeout pinning section 40% from bottom but still keep section 1 position in the middle or pin state, so when section 2 goes to 40% from bottom then section 1 starts the animation

See the Pen qBYByjZ by ivan-nizters (@ivan-nizters) on CodePen

[GreenSock 18,876 Likes (Superhero)]

If I understand you correctly, you just need to adjust the timing in your timeline. Have the first animation start at 0.4 (40% because you've got the entire timeline set up to be 1 second) and then adjust the other timings accordingly. 

See the Pen VwxwGyB?editors=0010 by GreenSock (@GreenSock) on CodePen